Life sure would be easier if that were the case Michal, but no... that
is not the case here. The sum is not a simple sum, it is a sum of all
elements having a lower or equal A and the same C. This is a
cumulative sum as pointed out by others.
2009/4/15 Michal Politowski mpol...@meep.pl:
On Wed,
Oh... and also, A, B, C are in the same table.
2009/4/17 Shug Boabby shug.boa...@gmail.com:
Life sure would be easier if that were the case Michal, but no... that
is not the case here. The sum is not a simple sum, it is a sum of all
elements having a lower or equal A and the same C. This is a
Michal... I must apologise, your suggestion worked a treat!!!
I never realised it was possible to do a join on a table to itself before!
2009/4/15 Michal Politowski mpol...@meep.pl:
On Wed, 15 Apr 2009 15:32:42 +0100, Shug Boabby wrote:
I simplified my problem a little too much and now I'm
On Wed, 15 Apr 2009 15:32:42 +0100, Shug Boabby wrote:
I simplified my problem a little too much and now I'm stuck trying to
use cumulative_sum(). My schema is not only A, B but also has a C
A B C
1 0 1
2 1 1
3 0 1
4 2 1
5 1 1
1 0 2
2 1 2
3 0 2
4 2 2
5 1 2
and I want to be able
Hello all,
I have a table with 2 bigint columns, let's call them A and B. I need
a query that will allow me to return A alongside the sum of Bs from
rows where A is less than or equal to this row's A. It is best
described with some example data, consider the following:
A B
1 0
2 1
3 0
4 2
5 1
I
On Wed, Apr 15, 2009 at 11:09:49AM +0100, Shug Boabby wrote:
Anyone have any ideas how to do this? I'm able to do it
programmatically, but it's slow. Optimally I'd like to be able to do
this in the DB. As you can see, it's a little trickier that the usual
aggregate function with a GROUP BY and
In response to Shug Boabby :
Hello all,
I have a table with 2 bigint columns, let's call them A and B. I need
a query that will allow me to return A alongside the sum of Bs from
rows where A is less than or equal to this row's A. It is best
described with some example data, consider the
I simplified my problem a little too much and now I'm stuck trying to
use cumulative_sum(). My schema is not only A, B but also has a C
A B C
1 0 1
2 1 1
3 0 1
4 2 1
5 1 1
1 0 2
2 1 2
3 0 2
4 2 2
5 1 2
and I want to be able to do the cumulative sum only when C is the same. E.g.
A funkySumB C
1
